The Reds are believed to have rejected an approach from Paris Saint-Germain for the striker in January, with Klopp unwilling to part ways with any of his senior stars mid-season.
That is unlikely to be the case in the summer, however, with another overhaul of personnel expected after a major decline in 2017.
“I have no idea what happens in the summer. It is not only Daniel but a lot of players,” he said.
“Daniel was not in training for eight or nine days because of a virus infection.
“We have to bring him back to the best shape possible and then bring this season to an end as successfully as possible.
“Then we will make decisions and speak about Daniel and any other players about what will happen at the end of the season.
“A lot of things will influence this and we can speak about it when it is time.”
They claim Lucas’ contract is set to expire, but the Brazilian is said to have told the Liverpool Echo‘s James Pearce that his deal runs until the end of the 2017/18 campaign.
Meanwhile, though Can is yet to agree an extension to the deal that also expires in 2018, both he and Lucas have been regular fixtures this season.
Moreno is the most likely to join Sturridge on Liverpool’s list of departures in the summer, having made just 15 appearances this season in all competitions, though there have been calls to restore him to the starting lineup.
How ruthless Klopp is with his other peripheral figures remains to be seen.
But the likes of Adam Bogdan, Ragnar Klavan, Mamadou Sakho, Kevin Stewart, Andre Wisdom, Connor Randall, Jon Flanagan, Cameron Brannagan, Sheyi Ojo, Ryan Kent, Lazar Markovic and Danny Ings could also feasibly move on.